Mix flour and water together in a bowl until smooth. Stir in cabbage, bacon, eggs, sausage, green onions, shrimp, cheese, and tenkasu.

Preheat a griddle to 400 degrees F (200 degrees C) and coat with oil.

Pour 1/4 of batter onto preheated griddle. Cook until golden brown, about 6 minutes per side. Transfer to a serving plate. Repeat to make a total of 4 pancakes.

Make sauce: Mix soy sauce, ketchup, and vinegar together in a small bowl. Drizzle over pancakes.

Garnish with panko and mayonnaise.